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K31Non-billableSave

K31 - Other diseases of stomach and duodenum

ICD-10-CM Chapter 11: Diseases of the digestive system · K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31) · Top-level category · FY2027

Coding Guidance

K31 is a non-billable heading. Report one of the 12 more specific codes below.

Includes, Excludes and Coding Notes

IncludesFrom K31

Conditions this code covers.

  • functional disorders of stomach
Excludes 2 — Not Included HereFrom K31

Not part of this code; report both codes when the patient has both conditions.

  • diabetic gastroparesis (E08.43, E09.43, E10.43, E11.43, E13.43)
  • diverticulum of duodenum (K57.00-K57.13)
Excludes 2 — Not Included HereFrom K20-K31 Diseases of esophagus, stomach and duodenum (K20-K31)

Not part of this code; report both codes when the patient has both conditions.

  • hiatus hernia (K44.-)
Excludes 2 — Not Included HereFrom Chapter K00-K95

Not part of this code; report both codes when the patient has both conditions.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More Specific Codes (12)

K31.0Acute dilatation of stomach→K31.1Adult hypertrophic pyloric stenosis→K31.2Hourglass stricture and stenosis of stomach→K31.3Pylorospasm, not elsewhere classified→K31.4Gastric diverticulum→K31.5Obstruction of duodenum→K31.6Fistula of stomach and duodenum→K31.7Polyp of stomach and duodenum→K31.8Other specified diseases of stomach and duodenum→K31.9Disease of stomach and duodenum, unspecified→K31.AGastric intestinal metaplasia→K31.BHypertrophic pyloric stenosis, in childhood→

Related condition guides

Documentation requirements, coding pitfalls and FAQs for conditions coded with K31.